Routing or engraving machine.



No. 696,951. Patented Apr. 8, I902. w. s. EATON.

ROUTING 0B ENGRAVING MACHINE.

(Application filed Nov. 27, 1899. Renewed Nov 29, 1901.] (No Model.) 4Sheets-$heet I.

WITNESSES I NVENT EIR No. 696,95I. Patented Apr., 8, I902.

W. S. EATON.

ROUTING 0B ENGRAVING MACHINE.

(A p'plication filed Nov. 27, 1899. Renewed Nov. 29, 1901.)

(No Model.) 4 Shets-Sheefl 2.

INVENT D R WITN EEEEE:

1n: scams PETER; Puma-mm" WASHINGTON, n. c.

No. 696,951. Patented Apr. 8, I902.

W. EATON.

ROUTING 0R ENGRAVING MACHINE.

(Application filed'Nov. 27, 1899. Renewed Nov. 29, 1901.)

I I VENTUR (NE ucwms PEYERS col "010mm, vusummm. o c.

m. 696,95l. Patented Apr. 8, I902.

w. s. EATON.

. ROUTING 0R ENGBAVING MACHINE.

(Application filed H0127, 1899. Renewed Nnv. 29, 1991.) (No Model.) 4Sheets-Sheet 4.

Illll WITNESSES 85 INVENTUR o mlia I a a J a; ATTYs m: NORRIS PETERS co.PHoTo-umu, WASNWOTON, D r

NITE terns \VILLIAM S. EATON, OF SAG HARBOR, NEW YORK.

ROUTING OR ENGRAVING MACHINE.

SPECIFICATION forming part of Letters Patent No. 696,951, dated April 8,1902.

Application filed November 2'7, 1899. Renewed November 29, 1901. SerialNo. 84,096- (IIo model.)

To ttZil whom it may concern:

Be it known that 1, WILLIAM S. EATON, a citizen of the United States ofAmerica, and a resident of Sag Harbor, county of Suffolk, State of NewYork, have invented certain new and useful Improvements in Routing orEngraving Machines, of which the following is a specification.

My invention relates to improvements in that class of machines known asrouting or engraving machines. I have particularly described mymechanism as the same pertains to a routing-machinethat is to say, onewherein the cutting instrument is caused to revolve during the processofengraving; but it Will be understood that it is applicableWhereastationarycuttinginstrumentis used. Generally speaking, theinstrument is operated on What is known as the pantograph plan ofreduction.

My present invention relates more particu larly to the economical andpractical arrangement of parts whereby I accomplish the result, and moreparticularly the perfect adjustment of which my machine is capable andthe arrangement of a leverage system 011 the pantograph plan, wherein avery perfect universal movement is obtained with a relatively smalldegree of friction.

This invention also relates to means by which I am able to maintain thetracer in a vertical position during the operation of tracing. It willbe readily understood that as the tracer is moved from a central zeroposition either to the right or left hand, if the tracer-arm is hingedto move only in one direction the tracer will necessarily be tilted outof the vertical plane as it is moved from its zero position. terdescribed I compensate for this movement by mounting the tracer in arock-shaft, and by rocking this shaft through a system ofuniversal-jointed levers, secured to a permanent base, I am able tocompensate for the inclination of the tracer due to the movement out ofthe zero position.

My machine is capable of simple engraving or die-cutting orotherroutingoperations.

I have designed this machine more particularly with the View of unitingstrength and construction with ease of adjustment and harmony ofoperation.-

By mechanisms hereinaf- I have illustrated my invention in theaccompanying drawings, referring to the parts by numerals, like partsbeing designated by like numerals.

Figure l is a front view of my machine in elevation. Fig. 2 is a planview omitting the bracket 8 and the mechanism supported thereby. Fig. 3is a vertical section of the parts lying between the uprights 2 and 3and a side view of other parts. Fig. l is a front View of the leveragesystem. Fig. 5 is a plan of the frame and rock-shaft forming theguide-arm.

I will now proceed to describe the machine in detail.

It is mounted upon a base, as 1. Upon this baselestablish threeuprights, (designated as 2, 3, and i.) The upright l is turnedhorizontally at its upper end and forms a bracket on which the leversystem is suspended. The uprights 2 and 3 are provided with guides, as 55, (shown in Fig. 2,) and also with vertical slots 6 6, (indicated indotted lines in Fig. 1,) in which the bolts 10 secure the brackets 7 and8 between the uprights 2 and 3 and in which said bolts move in theadjustment of the brackets.

7 and 8 are brackets provided with tongues 9 S), which slide within theguides 5 5, and 10, &c., are bolts and nuts passing through the brackets'7 and 8 and through the slot 6 to adj'ustably secure these saidbrackets to the uprights 2 and 3.

11 represents parallel Ways adapted to receive ball-bearings in the topof the bracket 7, and 12 indicates a beveled tongue in the top of thebracket 8.

I will now describe the construction and mounting of therouting-instrument holder employed by me in this machine.

13 is a support with a central vertical screwthreaded aperture throughthe same, and on the under side thereof are formed beveled ways 14,adapted to slide on the beveled tongue 12 on the top of the bracket 8.15 is a screw-threaded aperture in said support to receive a set-screw,and 16 is a set-screw for said aperture. 17 is a sleeve mounted on saidsupport 13, having engraved on its surface 17 a micrometer-scale. (Notillustrated.)

18 is a cylindrical part externally screwthreaded to be screwed into thescrew-threaded aperture of the support On the annular portion 18 isengraved an index-point for the purpose of indicating the relative po-'sition of the sleeve 18 with reference to the micrometer-scale 17 19 isa cylindrical part having an annular shoulder 20 at the top thereof andhaving conical bearings 21 setinto the lower portion thereof.

2 is a block adapted to fit into the upper end ofthe cylindrical part19,having an annular shoulder 23 to sustain it in that position and havingon the interior thereof a conical bearing.

24 is a shaft having mounted thereon a conical hub 25 and being taperedat one end, as at 26.

27 is a screw'thread on the shaft 24.

28 is a conical hub run on the shaft 24 and secured thereon by theset-screws 29.

30 is a pulley mounted on the shaft 24.

31 is a routing-tool holder, one end of which is provided with a conicalaperture 32 to receive the tapered end 26 of the shaft 24 and at theother end provided with an aperture and vise to receive and hold therouting-tool 33. I deem it unnecessary to describe the construction ofthis tool-holder, as it is wellknown in the art.

34 is a bracket-arm secured to the support 13 by the bolt 35 andcarrying at the other end suitably journaled thereto the guide-pulleys36 36.

The manner in which these parts last described are put together is asfollows: The support 13 is run on the tongue 12, and the sleeve 17 ismounted on said support 13. The cylindrical part 18 is then screwed intothe central aperture of the support 13. The cylindrical part 19 is thenrun into the cylindrical part 18. The shaft 24 is introduced from belowthrough the conical bearing 21. The block 22 is run on the shaft 24, andthe conical hub 28 is run on the shaft 24, and by the said screws 29 isfitted to proper adjustment into the conical bearings within said hub28. The pulley 30 is then put in position on the end of the shaft 24,and the routing-instrument holder is jammed on a tapered end 26 of theshaft 24. It will be readily understood that in this construction I canraise or lower the routing instrument by revolving the cylindrical part18, which is provided on its periphery with a hatched surface 18 to givea purchase for the manual operation of the same. The degree of movementof the cylindrical part 18 will be indicated by reading the differencebetween the micrometor-scale 17 and the index-point 18. A suitablepower-belt passes over the pulleys 36 36 to give a rotary motion to therouting instrument.

I will now proceed to describe the construction of my engraving-table,which is mounted to have a right-angular universal movement.

As heretofore stated, the bracket 7 is provided on its upper surfacewith parallel Ways 11. The plate 37 is provided on its under side withparallel ways 38 and on its upper side with parallel Ways 39, the Ways39 being at right angles to the ways 38.

40 is a plate, which I term the engravingtable, provided on its underside with parallel ways 41, parallel with the ways 39.

42 represents balls interposed within the above-described ways betweenthe bracket 7 and the plate 37 and between the plate 37 and the plate40.

43 is a tongue projecting from the table 40.

44 is a spring-collar, having a bolt and nut secured to the end of thetongue 43.

It will be readily understood that by this system of plates superimposedone above the other with ball-bearing ways at right angles to each othera universal right-angular movement is obtained by the operation of thetop plate 40. I therefore connect to this plate a multiple-leveragesystem constructed according to the pantograph system, in which a systemof levers is connected at its other end with a tracing-stylus, andthrough the operation of the stylus and leverage system I move the table40 beneath the routing or engraving instrument. I will now describe thissystem of levers. This system of levers is suspended as follows:

4 is a bracket suitably mounted and having a head, as 45, with centerbearings therein, 46, and 47 is a frame having center-bearing points 47,which engage 46.

48 is a collar mounted on the frame 47, secured to and adjustablethereon by the lockbolt and nut 49.

50 represents the bifurcated ends of a vertical lever 51, and 51 is avertical lever.

52 represents center-bearing points carried in the bifurcated ends 50 50of the lever 51, which engage 48, and 53 53 are slots in the bifurcatedarms 50 50.

54 is a plate attached to the vertical lever 51 by screws 55, passingthrough slots in the said bifurcated arms 50, said plate beingadjustable within said slots by the releasing or tightening of saidscrews 55. The plate 54 is provided with center bearings 56.

57 is a link having bifurcated arms 58 58, said arms carryingcenter-bearing points 59, which engage 56. Said link has also bifurcatedarms 60 60, carrying centerbearing points 61.

63 is a center-bearing block with four arms and four center bearings atthe ends of said arms, said bearings not being designated by number.

64 is a bifurcated frame carrying bearingpoints 65 in the arms of saidframe.

66 is a vertical rod secured to the frame and adapted to be mountedwithin the elastic sleeve '44.

67 is a bracket secured to the upright 4 and provided at one end with asocket-bearing 68.

69 is a rod having at either end knobs or ball-bearing ends 71 and 72.This rod is broken in the center and connected by an adjustment-screw70, by which it may be adjusted to any desired length.

i 73 is the bifurcated end of the vertical lever 51, in which aremounted the center-bearing points 74.

75 is a guide-arm frame having center bearings 76 76, by which it ishinged between the center-bearing points 74 74.

77 77 are center-bearing points between which are journaled' therock-shaft 7E). The rock-shaft 79 is provided with an aperture, as 80,to receive the tracer 84.

At 78 I have indicated a rectangular ;ortion of the frame 75, forming anaperture through which the lever 81, hereinafter to be described, mayfreely operate. This lever 81 is secured to the shaft 79 by a collar, asS2, and at the other end, as at 83, it is provided with a ball-bearingsocket to receive the knob or head 72 of the rod 69, and Si is a tracermounted in the rock-shaft 79.

Having now described the several parts, I will refer briefly to theadjustments of the leverage system. This system interposed between thetracer-stylus and the en gravingtable may be adjusted by changing thepoints of fulcrum to suit the conditions which it is proposed to meet.To begin with, a startingpoint is found by bringing all of the points offulcrum into the same plane. Thus a zero position is found in which thestylus may be moved without affecting any of the operative parts. Thedegree of movement of the fulcrum of any of the parts away from thiscenter and into other and different planes con stitutes the adjustablefeature of my leverage system, and by this variable adjustment I mayobtain variable results. It will be readily understood from thedescription already had that I may adjust these fulcrums by releasingthe bolts 49 and moving the collar 48 up and down on the frame 47 andsecuring the same in any desired position and by releasing the screw 55and moving the plate 54 up or down within the ways in the bifurcatedarms of the vertical lever 50.

It is unnecessary for me to explain in detail the variety of sizes andforms of reproduction which 1 may obtain by varying the points offulcrum, as last described. The present apparatus is constructed for thereproduction of a reduced figure. The points of fulcrum above referredto may be expressed by reference to the center-bearing points,(designated as follows: 47, 52, and 59,) and when I refer to bringingthe fulcrumpoints into the same plane I mean bringing the center-bearingpoints into the same plane, and when I refer to moving thecenter-bearing points out of the same plane I mean moving thecenter-bearing points so as to change the relative position of thepoints of fulcrum to a point-as, for illustration, according to theposition indicated in the drawings submitted herewith.

The operation of my machine is as follows: The pattern or design to bereproduced is secured upon a tracing-table beneath a tracer, and theoperator manually moves the tracer over the surface to be traced, andthe movementof the tracer is transmitted, through the leverage systemhereinbefore described, to the engraving table 40, which in turn moveson its mountings in a two-way rightangular movement, which is, in fact,a universal movement. The engraving-table carries the surface to beengraved, and the rent ing or engraving tool is suitably adjusted withreference to the surface to be engraved by the micrometer-screw 18 or alarger ad justment by raising or lowering the brackets 7 and 8. As thesurface to be engraved is secured to the engraving-table and theengraving-table is moved by the leverage system wit-h every movement ofthe tracer, it will be manifest that the surface to be engraved movesbetween the fixed engraving instrument in accordance with the movementsof the tracer. I deem it unnecessary here to further describe thepantograph system of reproduction, as this is well understood in theart.

The tracer, heretofore stated, is mounted in the rock-shaft 79. In anormal position this tracer, the vertical lever 51, and the rod 69 arevertical, and therefore parallel. As the tracer is moved to the right orleft the lever 51 and the rod are moved out of the vertical position;but by reason of the fact that the bracket 67 is stationary the arm 81will be depressed or elevated by the rod 69 with either a right or aleft hand movement, and in this depression or elevation of the arm 81the rock-shaft 75) will be rocked to maintain the tracer st in avertical position. It will be therefore seen that the function of thebracket 67, red 69, arm 81, and rock-shaft 79 is to maintain the tracer84 in a vertical position. Thus it will be seen that by the leveragesystem and guides I am able to transmit from a tracer maintainedin aver-,

sists of acylindrical part, suitably mounted,-

having a central screw-threaded aperture, a second cylindrical part,externally screwthreaded to screw into the first cylindrical part, withmeans to lock said cylindrical parts together at any position within thelimits of the helical movement, a third cylindrical part having anannular shoulder-at one end, and having mounted within the same at theother end a conical bearing, a second conical bearing, adapted to fitinto and be retained in the other end of said third cylinder,

ashaft carrying two conical bearings, adapted to fit'in said conicalbearin gs, the third cylindrical part being run Within the secondcylindrical part, and means to secure a suitable routing instrument tosaid shaft, and means to revolve said shaft, substantially as described.

2. In a routing-machine, means to support and revolve a routinginstrument, which consists of a cylindrical part having a centralscrew-threaded aperture and beveled ways in its base, the same beingmounted on abracket having a beveled tongue upon which said beveled waysmay play, a second cylindrical part, externally screw-threaded to screwinto the first cylindrical part, with means to lock said cylindricalparts together at any position within the limits of the helicalmovement, a third cylindrical part having an annular shoulder at oneend, and having mounted within the same at the other end a conicalbearing, a second conical bearing, adapted to fit into and be retainedin the other end of said third cylinder, a shaft carrying two conicalbearings, adapted to fit in said conical bearings, said shaft havingalso a tapering end on which the routing-instrument holder is journaled,the third cylindrical part being run within the second cylindrical part,and means to revolve said shaft, substantially as described.

3. In an engraving or routing machine, an engraving-table suitablymounted to have a universal movement, a link pivotally connected to saidtable by a universal joint, a suspended lever pivotally mounted on abracket by a universal-joint system, the other end of the link beingpivotally connected with the upper end ofsaid suspended lever,aframepivotally connected with the lower end of said suspended lever, and arock-shaft journaled in said frame with a tracer secured to said shaftand a lever secured thereto also, said lever having at the other end asocket, a second bracket secured to said bracket and having at the otherend a socket and a shaft with ball-heads at either end thereof, saidheads being mounted in said sockets, substantially as described.

4:- In an engraving or routing machine,a leverage system pivotallyconnected and mounted as follows: a bracket with a head having a framemounted on said head with center-bearing points, acollar having centerbearings and adjustably mounted on said frame; a bifurcated verticallever hinged to said collar by center bearings, a plate adj ustablymounted on said vertical lever and having center bearings, and a linkhinged to said plate by center bearings, said link being pivotallyconnected at the other end to an engraving-table suitably mounted tohave a universal movement; the lower end of said vertical lever beingbifurcated, a frame pivotally mounted within said lastmentionedbifurcated arms, a rock shaft journaled within said frame with atracer-point secured to said rock-shaft, a rod secured to saidrock-shaft atone end, and ha'vin g a socket at the other end, a secondbracket secured to said bracket, with a socket at the end of the secondbracket, a shaft having ballbearing heads at either end thereof mountedone in each of said sockets, substantially as described.

5. In an engraving-machine, a leverage system pivotally connected andmounted as follows: a bracket, a frame pivoted to the head of saidbracket, a collar adjustably mounted on said frame, a vertical leverbifurcated at its lower end, suspended from and pivotally connected tosaid collar whereby through the adjustment of the collar on the frame,the axial connections of the vertical lever may be brought into the sameplane oimoved out of such plane, an engraving-table mounted to have auniversal movement, a plate adj ustably mounted on the vertical lever,and connected to one end of the lever, a link pivotally connected at oneend by right-angular universal-jointed connections to saidengraving-table and connected at the other to said plate, a frameconnected to the other end of the suspended lever, a rock-shaftjournaled within said frame, a tracer secured .to said rock-shaft, anarm secured to said rock-shaft at one end and having a socket at theother end, a second bracket secured to said firstnamed bracket at oneend and having a socket at the other end, and a rod having ball-bearin gends and bearing in said sockets, substantially as described.

6. In an engraving-machine,a tracer mounted on a rock-shaft,meansconnecting the rockshaft to the work-table and means maintaining saidtracer in a vertical position by rock? ing said shaft relatively to theconnecting means, substantially as described.

7. In an engraving-machine the combination of a suspended lever, atracer mounted on a rock-shaft journaled at one end of the suspendedlever, connections to a work-table, and means maintaining the tracer ina vertical position by rocking the shaft relatively to the connectingmeans, substantially as described.

8. In an engraving-machine, a lever suspended from a suitable bracket, aguide-arm frame hinged to the lower end of the suspended lever and arock-shaft journaled in said frame, said rock-shaft carrying at one enda tracer and connected at the other end with a rock-arm, said rock-armhaving a socket at one end,a second bracket secured to said firstnamedbracket at one end and having a socket at the other end, a rod having aknob at each end j ournaled in said sockets, the parts being mounted andadjusted, substantially as described.

Signed by me at New York, N. Y., this 6th day of November, 1899.

WILLIAM S. EATON.

Witnesses:

EMMA W. FINLAYSON, THOMAS P. DALTON.

